Editing Hubbert peak theory (section)

===Transition metals===
{{Main|Peak copper}}
Hubbert applied his theory to "rock containing an abnormally high concentration of a given metal"<ref>{{cite web |url=http://www.hubbertpeak.com/hubbert/wwf1976 |title=Exponential Growth as a Transient Phenomenon in Human History |publisher=Hubbertpeak.com |access-date=2013-11-03 |archive-date=2013-07-12 |archive-url=https://web.archive.org/web/20130712115025/http://www.hubbertpeak.com/hubbert/wwf1976/ |url-status=dead }}</ref> and reasoned that the peak production for metals such as [[copper]], [[tin]], [[lead]], [[zinc]] and others would occur in the time frame of decades and [[iron]] in the time frame of two centuries like coal. The price of copper rose 500% between 2003 and 2007<ref>{{cite web|url=http://minerals.usgs.gov/minerals/pubs/commodity/copper/mcs-2008-coppe.pdf |title=Copper |author=Daniel L. Edelstein |publisher=[[U.S. Geological Survey]], Mineral Commodity Summaries |date=January 2008 |access-date=2013-12-27}}</ref> and was attributed by some{{who|date=December 2013}} to [[peak copper]].<ref name=Leonard2006>{{cite web
 |url=http://www.salon.com/tech/htww/2006/03/02/peak_copper/index.html 
 |title=Peak copper? 
 |work=Salon 
 |author=Andrew Leonard 
 |date=2006-03-02 
 |access-date=2008-03-23 
 |url-status=dead 
 |archive-url=https://web.archive.org/web/20080307042349/http://www.salon.com/tech/htww/2006/03/02/peak_copper/index.html 
 |archive-date=2008-03-07 
}}</ref><ref>{{cite web|url=http://news.silverseek.com/CharlestonVoice/1135873932.php|title=Peak Copper Means Peak Silver|publisher=News.silverseek.com|access-date=2013-11-03|url-status=dead|archive-url=https://web.archive.org/web/20131104020042/http://news.silverseek.com/CharlestonVoice/1135873932.php|archive-date=2013-11-04}}</ref> Copper prices later fell, along with many other commodities and stock prices, as demand shrank from fear of a [[Late 2000s recession|global recession]].<ref>{{cite web|url=http://uk.reuters.com/article/oilRpt/idUKN2747917920090129 |archive-url=https://web.archive.org/web/20200920185939/https://uk.reuters.com/article/oilRpt/idUKN2747917920090129 |url-status=dead |archive-date=September 20, 2020 |title=Commodities – Demand fears hit oil, metals prices  |publisher=Uk.reuters.com |date=2009-01-29 |access-date=2013-11-03}}</ref> [[Lithium]] availability is a concern for a fleet of [[Li-ion battery]] using cars but a paper published in 1996 estimated that world reserves are adequate for at least 50 years.<ref>{{cite journal |last1=Will |first1=Fritz G. |title=Impact of lithium abundance and cost on electric vehicle battery applications |journal=Journal of Power Sources |date=November 1996 |volume=63 |issue=1 |pages=23–26 |doi=10.1016/S0378-7753(96)02437-8 |bibcode=1996JPS....63...23W |id={{INIST|2530187}} }}</ref> A similar prediction<ref>{{cite web|url=http://www.dft.gov.uk/stellent/groups/dft_roads/documents/page/dft_roads_024056-01.hcsp |title=Department for Transport  |publisher=Dft.gov.uk |access-date=2013-11-03}}</ref> for [[platinum]] use in fuel cells notes that the metal could be easily recycled.